Current Electri...

The peak value of an alternating e.m.f. which is given by $$E={ E }_{ 0 }$$$$\omega $$ is 10 volts and its frequency is 50 Hz. At time $$t=\dfrac { 1 }{ 600 } $$ s, The instantaneous e.m.f. 

The length of a potentiometer wire is $$l$$. A cell of emf E is balanced at a length $$\dfrac{l }{ 3}$$ from the positive end of the wire. If the length of the wire is increased by $$\dfrac{l} { 2}$$.
At what distance will the same cell give a balance point?

Current in a circuit falls from $$5.0$$A to $$0.0$$A in $$0.1$$S. If an average emf of $$200$$V induced, given an estimate of the self-inductance of the circuit.

The equivalent resistance between A and B in the following figure is 

Two cells of e.m.f. $$ E_1 = 8$$V and $$E_2 = 4V, $$ with internal resistance 1 ohm and 2 ohm respectively are connected so that they oppose each other. this combination of cells is connected to an external resistance of 5 ohm. the terminal potential difference across the cell $$ E_2 $$ is :

Kirchhoff's first law is based on the law of conservation of.

For the circuit shown in figure given below, the equivalent resistance between points A and B is

Kirchhoff's first law at a junction is based on conservation of 

In Fig.,value of $${ I }_{ x }and\quad { I }_{ y }$$ are respectively

In metre bridge experiment, with a standard resistance in the right gap and a resistance coil dipped in water (in a beaker) in the left gap, the balancing length obtained is 'l'. If the temperature of water is increased, the new balancing length is